The Spanish word 'albóndiga' (meatball) has a fascinating journey that starts in Ancient Greek. It comes from the Greek 'karyon pontikon' (κάρυον ποντικόν) meaning 'Pontic nut' or 'hazelnut'. This term was borrowed into Classical Arabic as 'bunduqah', where it came to mean both 'hazelnut' and more generally 'ball-shaped object'. The word then evolved in Andalusi Arabic (the Arabic spoken in medieval Islamic Spain) to 'albúnduqa', where it specifically came to mean 'meatball'. Finally, it entered Spanish as 'albóndiga', maintaining its meaning of 'meatball'.

This etymology shows how a word for a specific type of nut evolved to describe any ball-shaped object, and eventually settled on describing specifically a ball of meat. The 'al-' prefix in 'albóndiga' is a clear sign of its Arabic origin, as this is the Arabic definite article (like 'the' in English).

A related Spanish word is 'búnker', which also comes from the same Arabic root 'bunduq'. While 'albóndiga' developed to mean a ball of meat, 'búnker' took on the meaning of a fortified structure, originally referring to structures that were round or ball-like in shape.

While there aren't direct English cognates from this Greek-Arabic etymology, English speakers might be familiar with the word 'bunker', which shares the same Arabic ancestor as 'albóndiga'. It's fascinating to see how the same root word evolved to mean such different things: a meatball in Spanish and a fortified shelter in English, both connected by the original concept of something round or ball-shaped.